//
//  CZMainTabBar.swift
//  CZweibo
//
//  Created by mac on 16/3/20.
//  Copyright © 2016年 mac. All rights reserved.
//

import UIKit
let TabBarItemCount = 5

class CZMainTabBar: UITabBar {

    override func layoutSubviews() {
        super.layoutSubviews()
        print("CZMainTabBar:layoutSubviews")
        // 计算 item的宽度
        let width = frame.width / CGFloat(TabBarItemCount)
        var index = 0
        for view in subviews{
            let cls  = NSClassFromString("UITabBarButton")
            if view.isKindOfClass(cls!){
            view.frame = CGRect(x: CGFloat(index) * width, y: 0, width: width, height: frame.height)
                
                index+=index == 1 ? 2 : 1
            }
        }
        composeButton.frame = CGRect(x: 2 * width, y: 0, width: width, height: frame.height)
        
        
    }
    // MARK: - 懒加载
    private lazy var composeButton: UIButton = {
    let button = UIButton()
        //设置按钮图片 tabbar_compose_button_highlighted
        button.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: UIControlState.Normal)
        
        button.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: UIControlState.Highlighted)
        
        //tabbar_compose_icon_add_highlighted
        button.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: UIControlState.Normal)
        
        button.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: UIControlState.Highlighted)
        
        self.addSubview(button)
        
        return button
    }()
}
